Marco De Paoli

🧵 9/n @poftwente.bsky.social #physics #engineering @utwente.bsky.social @tuwien.at

🧵 8/n We also acknowledge the @eurohpc-ju.bsky.social for awarding the projects EHPC-BEN-2024B08-060 and EHPC-EXT-2024E02-122 to access the EuroHPC supercomputer MareNostrum5 hosted at the @bsc-cns.bsky.social (Spain).

🧵 7/n This project has received funding from the European Union’s @horizoneu.bsky.social (@scienceinnovation.ec.europa.eu) under Marie Sklodowska-Curie grant agreement MEDIA no. 101062123.

🧵 6/n Thanks to Guru Sreevanshu Yerragolam (@utwente.bsky.social), Roberto Verzicco (Gran Sasso Science Institute)
and @detleflohse.bsky.social (@utwente.bsky.social) for the great collaboration.

Solute mixing in porous media with dispersion and buoyancy | Journal of Fluid Mechanics | Cambridge Core Solute mixing in porous media with dispersion and buoyancy - Volume 1020

🧵 5/n The paper is published on J. Fluid Mech. (@cambup-scieng.cambridge.org) and freely available for download here www.cambridge.org/core/journal...

Predicting dispersion of contaminants Transport and dispersion of contaminants in the subsurface are common to many geophysical and industrial applications. How can we model these processes including dispersion and buoyancy?

🧵 4/n Salt water basins are used to manage water resources in regions where the subsurface is characterised by high-salinity groundwater. Here marcodepaoli.com/2025/10/01/d... we provide an example.

🧵 3/n However, when the flow is driven #buoyancy forces induced by the contaminant itself, predictions may be uncertain. This is the case of salt dispersion from artificial lakes.

Schematic representation of the hydrogeology of the River Murray basin area (Australia).

🧵 2/n #Transport and #dispersion of #contaminants in the subsurface are common to many geophysical and industrial applications, from the management of nuclear waste to the dispersion of chemicals and pollutants. Dispersion models to predict these scenarios exist, and are well developed.

🚨 PAPER ALERT 🚨 Can we predict the #dispersion of contaminants in #groundwater flows?

🧵 1/n Here marcodepaoli.com/2025/10/01/d... we provide an example.

Movie: Evolution of a Rayleigh-Taylor system in porous media with dispersion and buoyancy.

3/3 @utwente.bsky.social @tuwien.at @poftwente.bsky.social

Open access provided by @tuwien.at
Funding provided by @fwf-at.bsky.social
📸 Image: Sketch of a slender fibre undergoing both rotation and translation.

2/3 In this work with Giuseppe CA Caridi, Vlad Giurgiu and Alfredo Soldati, we quantify the uncertainty associate with these measurements, and provide guidelines to optimise the acquisition parameters. This work published on @Experiments in Fluids is #open #access and available here rdcu.be/ekP9O

Rotation and translation of a long curved fiber

🚨 new paper alert 🚨
1/3 🌊 Measuring experimentally the dispersion of #microplastic #fibres in turbulent flows is incredibly challenging, due to their small size. However, experiments are key to develop reliable models to predict the fate of microplastics in #environmental #flows.

Computer simulations suggest CO₂ can be stored underground indefinitely We have to stop emitting carbon dioxide (CO2) if we want to save the climate—there is no doubt about that. But that alone will not be enough.

Computer simulations indicate that CO2 can be stored underground indefinitely by dissolving in groundwater, forming a denser liquid that sinks, ensuring long-term storage under suitable geological conditions. doi.org/g9dtm4

Wie man Kohlendioxid für immer loswird Was passiert, wenn man abgeschiedenes CO2 in den Boden pumpt? Hochaufwändige Computersimulationen ermöglichen es nun, das langfristige Verhalten vorherzusagen.

Lässt sich CO2 dauerhaft im Boden speichern? Ja, sagt eine neue Modellrechnung der TU Wien, die genau analysiert, wie sich CO2-haltiges Wasser im Boden verhält. www.tuwien.at/tu-wien/aktu...

Simulation and Modeling of Convective Mixing of Carbon Dioxide in Geological Formations Convective mixing of carbon dioxide in geological formations follows different regimes During a regime in which the flux is constant, mixing in 3D simulations is 13% larger than in 2D simulations...

🧵8/8 The manuscript and the data are freely available for download.

📕 Paper agupubs.onlinelibrary.wiley.com/doi/10.1029/...

💻 Data figshare.com/articles/dat...

#PhysicsOfFluids #physics #engineering #OpenAccess #OpenSource #UniversityTwente #TUWien

🧵7/8 We acknowledge the @eurohpc-ju.bsky.social for awarding the project GEOCOSE and for granting access to the EuroHPC supercomputer LUMI‐C, hosted by the @lumi-supercomputer.eu consortium (Finland).

🧵6/8 This project has received funding from the European Union's @horizoneu.bsky.social research and innovation programme under the Marie Sklodowska‐Curie grant agreement MEDIA.

🧵4/8 With this dataset, which we make freely available, we derive a simple, reliable and accurate physical model to describe the post‐injection dynamics of carbon dioxide. This model can be used to identify suitable sequestration sites or to design carbon dioxide injection strategies.

🧵3/8 We used massively parallelized numerical simulations to systematically investigate the flow dynamics in 3D systems and provide a robust quantification of the differences occurring with respect to ideal 2D systems.

🧵2/8 In our new #Open #Access paper, published today on Geophysical Research Letters @agu.org, we answer this question in the context of homogenous and isotropic rock formations.

Simulation and Modeling of Convective Mixing of Carbon Dioxide in Geological Formations Convective mixing of carbon dioxide in geological formations follows different regimes During a regime in which the flux is constant, mixing in 3D simulations is 13% larger than in 2D simulations...

🧵1/8 To mitigate the catastrophic effects of #globalwarming, we will have to capture from the atmosphere billions of tons of #carbondioxide, and store it underground.

And there is no doubt about that.

But what will it happen in the subsurface?

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

🧵5/8 This work is the result of a collaboration between the @poftwente.bsky.social @utwente.bsky.social, @newcastleuni.bsky.social, Sapienza Università di Roma and @tuwien.at.

🧵5/6 Two different algorithms are proposed to solve the scalar transport and to efficiently adapt to the different flow conditions.

📸 In the figure: Evolution of a Rayleigh-Taylor instability in a porous - 3D visualization of the concentration field.

🧵4/6 AFiD-Darcy is suitable to investigate different canonical flows. To show the code's capabilities, the maximal driving strength explored has been doubled as compared to state-of-art simulations, corresponding to an increase of the associated computational effort of about 8 to 16 times.

🧵3/6 Here we provide an efficient and parallel #open #source code to analyze these problems. We extend the simulation capabilities of the Advanced Finite Difference solver AFiD, developed at @poftwente.bsky.social, and we focus on the simulation of strongly convective Darcy flows.

🧵2/6 Flows in #porous #media are relevant to key #geophysical and #industrial processes, including geological carbon dioxide sequestration, latent heat thermal energy storage systems, solidification of sea ice and #dispersion of #contaminants in groundwater flows.
#physics #OpenAccess #OpenSource

🧵6/6 This contribution represents a key milestone of the Marie Sklodowska-Curie Fellowship MEDIA (project n. 101062123), funded from the @ec.europa.eu Horizon Europe.
The code and the paper are freely available for download.
📕 Paper doi.org/10.1016/j.cp...
💻 Code github.com/depaolimarco...

Evolution of a Rayleigh-Taylor instability in a porous - 3D visualization of the concentration field.

🚨 PAPER ALERT 🚨 Comput. Phys. Commun.
🧵1/6 We present the code AFiD-Darcy, designed for massively parallel numerical simulations of convective porous media flows. Thanks to Guru Sreevanshu Yerragolam, Detlef Lohse and Roberto Verzicco for the great collaboration at @poftwente.bsky.social

Sign of "Via Panisperna" on the wall of a building

Here is where nuclear physics has begun, thanks to #EnricoFermi and the guys of Via Panisperna.

⏳ Deadline is 31/08/2025

Additional details about topics and submission are available here: epje.epj.org/epje-open-ca...

📚 The European Physical Journal is published by EDP Sciences, Springer Nature and Società Italiana di Fisica.

#microplastics #physics #fluiddyanamics #environmentalflows